CN100427970C - Optical aberration compensating lens - Google Patents
Optical aberration compensating lens Download PDFInfo
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- CN100427970C CN100427970C CNB2004100065318A CN200410006531A CN100427970C CN 100427970 C CN100427970 C CN 100427970C CN B2004100065318 A CNB2004100065318 A CN B2004100065318A CN 200410006531 A CN200410006531 A CN 200410006531A CN 100427970 C CN100427970 C CN 100427970C
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Abstract
The present invention relates to an optical aberration compensating lens which comprises a lens body and a plurality of filtering films, wherein the lens body has a light incidence surface, a light emergent surface and a light axis; the light incidence surface and/or the light emergent surface are/is composed of a plurality of discontinuous blocks, for example a plurality of annular blocks, fan-shaped blocks and polygonal blocks, which have different sizes; the filtering films are respectively arranged on the blocks of the lens body; the filtering films comprises red light band filtering films, green light band filtering films or blue light band filtering films. The present invention can effectively avoid optical aberration.
Description
Technical field
The present invention relates to a kind of lens, particularly relate to a kind of aberration compensation (chromaticaberration) lens.
Background technology
Progress along with modern science and technology, many optical articles are also constantly weeded out the old and bring forth the new, no matter be that brightness enhancement layer, CD-ROM, the VCD-ROM of the module backlight of handset displays panel or camera display panel, the optical read head (optical read head) of DVD-ROM all must use lens (lens).In addition, present digital camera (Digital Still Camera, DSC) and digital camera (Digital VideoCamera, DVC) in, lens also are indispensable important.In above-mentioned optical articles, lens will directly have influence on the fiduciary level of product operation for the processing of light source.In the general optical articles, if when adopting white light as light source, regular meeting has the phenomenon of aberration to produce.
Seeing also shown in Figure 1A, is the synoptic diagram that produces the aberration phenomenon behind the existing known lens of white light source process.Traditional lens 10 have a light entrance face 12, a light-emitting face 14 and an optical axis 16.When the optical axis 16 that is parallel to lens 10 as white light W is injected by the light entrance face 12 of lens 10, white light W after lens 10 refraction, can be again by light-emitting face 14 outgoing of lens 10, at this moment, white light W can reflect into the light of three primary color wavelength bands, is respectively a blue light B, a green glow G and a ruddiness R.Because the wavelength difference of blue light B, green glow G and ruddiness R, position b, the g, the r that make blue light B, green glow G and ruddiness R refract to respectively on the optical axis 16 are neither identical, thereby produce the aberration phenomenon.
This aberration phenomenon then is relevant with chromatic dispersion (dispersion) degree of lens, generation for fear of this kind aberration phenomenon, as a result the special lens combination (lens systems) of anaberration (achromat) or multiple anaberration (apochromaticdoubles) in response to and give birth to, and this kind lens combination is made of lens different more than two, to eliminate this aberration phenomenon.
Seeing also shown in Figure 1B, is the synoptic diagram of the lens combination of existing known elimination aberration phenomenon.Should have the lens (flint lens) 120 that known lens combination 100 comprises lens (crown lens) the 110 and one flint glass material of a crown glass material now, wherein the crown glass material has a lower dispersity compared to the flint glass material.The lens 110 of above-mentioned crown glass material comprise a light entrance face 112, light-emitting face 114 and an optical axis 116, when white light W is parallel to optical axis 116 and is injected by the light entrance face 112 of lens 110, this lens combination 100 can intersect at same position through the lens 110 of crown glass material and lens 120 refraction light R, the B afterwards of flint glass material, so can compensate the aberration phenomenon that is produced between blue light B and the ruddiness R.
It should be noted that, because existing known lens combination 100 need be cooperated by lens different more than two, and the specification of every lens 110,120 and arrangement pitches all can influence the aberration compensation effect of this lens combination 100, the assembly error of therefore any lens combination 100 slightly, the scale error of lens itself, or this lens combination 100 is subjected to vibrations or when heavily falling, for its aberration compensation effect great influence is arranged all.Therefore, make that also the output of lens combination 100 or assembling yield (lowyield rate) are on the low side.
This shows that above-mentioned existing aberration compensation lens still have defective, and demand urgently further being improved.In order to solve the problem that the aberration compensation lens exist, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing aberration compensation lens exist, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, actively studied innovation, in the hope of founding a kind of novel aberration compensation lens, can improve general existing aberration compensation lens, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective that existing aberration compensation lens exist, and provide a kind of aberration compensation lens of new structure, technical matters to be solved be make its effectively compensatory light in the aberration situation that after refraction, is produced, thereby be suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.According to a kind of Chromatically compensated lens that the present invention proposes, it comprises: a lens body, have a light entrance face and a light-emitting face, and wherein this light-emitting face is made of most discontinuous first blocks; And the light filter film of most different color light wave bands, be disposed at respectively on this majority discontinuous first block of this lens body.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid Chromatically compensated lens, wherein said lens body has an optical axis, and should majority discontinuous first block comprise the ring-type block that most sizes do not wait, and the ring-type block that should a majority size wait is around this optical axis arrangement.
Aforesaid Chromatically compensated lens, wherein said should majority discontinuous first block be to be selected from the group that is made up of fan-shaped block and polygon block.
Aforesaid Chromatically compensated lens, wherein said light entrance face are made of most discontinuous second blocks, and individual discontinuous second block of described majority disposes the light filter film that the light filter film by the different color light wave band constitutes respectively.
Aforesaid Chromatically compensated lens, wherein said lens body has an optical axis, and should majority discontinuous second block comprise the ring-type block that most sizes do not wait, and the ring-type block that should a majority size wait is around this optical axis arrangement.
Aforesaid Chromatically compensated lens, wherein said should majority discontinuous second block be to be selected from the group that is made up of fan-shaped block and polygon block.
Aforesaid Chromatically compensated lens, wherein said lens body are Fresnel lens (Fresnellens).
Aforesaid Chromatically compensated lens, wherein said lens body be a spherical lens and a non-spherical lens one of them.
Aforesaid Chromatically compensated lens, the material of wherein said lens body be glass and plastics one of them.
Aforesaid Chromatically compensated lens, wherein said light filter film that should a majority different color light wave band comprises red spectral band light filter film, green light band light filter film and blue wave band light filter film.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.According to a kind of Chromatically compensated lens that the present invention proposes, it comprises: a lens body, have a light entrance face and a light-emitting face, and wherein this light entrance face is made of most discontinuous blocks; And the light filter film of most different color light wave bands, be disposed at respectively on this majority discontinuous block of this lens body.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid Chromatically compensated lens, wherein said lens body has an optical axis, and should majority a discontinuous block comprise the ring-type block that most sizes do not wait, and the ring-type block that should a majority size wait is around this optical axis arrangement.
Aforesaid Chromatically compensated lens, wherein said should a majority discontinuous block be to be selected from the group that is made up of fan-shaped block and polygon block.
Aforesaid Chromatically compensated lens, wherein said lens body are Fresnel lens (Fresnellens).
Aforesaid Chromatically compensated lens, wherein said lens body be a spherical lens and a non-spherical lens one of them.
Aforesaid Chromatically compensated lens, the material of wherein said lens body be glass and plastics one of them.
Aforesaid Chromatically compensated lens, wherein said light filter film that should a majority different color light wave band comprises red spectral band light filter film, green light band light filter film and blue wave band light filter film.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present invention thes contents are as follows:
The present invention proposes a kind of Chromatically compensated lens, comprise a lens body and a plurality of light filter film, wherein lens body has a light entrance face and a light-emitting face, and light entrance face and/or light-emitting face are made of a plurality of discontinuous block, and a plurality of light filter film is the block that is disposed at lens body respectively
According to the described Chromatically compensated lens of preferred embodiment of the present invention, wherein lens body has an optical axis, and block comprises ring-type block, fan-shaped block, polygon block that a plurality of sizes do not wait, and wherein the ring-type block that do not wait of these most sizes is around this optical axis arrangement.
According to the described Chromatically compensated lens of preferred embodiment of the present invention, wherein lens body is Fresnel lens (Fresnel lens).
According to the described Chromatically compensated lens of preferred embodiment of the present invention, wherein lens body is a spherical lens or a non-spherical lens.
According to the described Chromatically compensated lens of preferred embodiment of the present invention, wherein the material of lens body is glass or plastics.
According to the described Chromatically compensated lens of preferred embodiment of the present invention, wherein a plurality of light filter films comprise red spectral band light filter film, green light band light filter film and/or blue wave band light filter film.
Via as can be known above-mentioned, the invention relates to a kind of Chromatically compensated lens, comprise a lens body and a plurality of light filter film, wherein lens body has a light entrance face, a light-emitting face and an optical axis, and light entrance face and/or light-emitting face are made of a plurality of discontinuous block, and these most discontinuous blocks for example are the ring-type block of a plurality of different sizes, fan-shaped block, polygon block.A plurality of light filter films are to be disposed at respectively on these most discontinuous blocks of lens body, and it comprises red spectral band light filter film, green light band light filter film or blue wave band light filter film.Above-mentioned Chromatically compensated lens can be avoided aberration effectively.
By technique scheme, the present invention has following advantage at least: based on above-mentioned, the present invention is because of adopting a plurality of light filter films on the block of a lens body, the light filter film may command of these most different color light wave bands is by the coloured light of this light filter film, therefore Chromatically compensated lens of the present invention only need to adjust the shape of the block of lens body, thickness and position, and cooperate the light filter film that disposes the different color light wave band on block, aberration phenomenon that just can compensatory light, and the present invention just can reach the purpose of aberration for compensation phenomenon because of only needing single lens, so can improve its output yield on the Chromatically compensated lens of manufacturing.
In sum, the Chromatically compensated lens of special construction of the present invention, compensatory light is in the aberration situation that is produced after refraction effectively.It has above-mentioned many advantages and practical value, and in like product, do not see have similar structural design to publish or use and really genus innovation, no matter it structurally or bigger improvement all arranged on the function, have large improvement technically, and produced handy and practical effect, and more existing Chromatically compensated lens have the multinomial effect of enhancement, thus be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
Description of drawings
Figure 1A is the synoptic diagram that produces the aberration phenomenon behind the existing known lens of white light source process.
Figure 1B is the synoptic diagram of the lens combination of existing known elimination aberration phenomenon.
Fig. 2 A is the synoptic diagram according to the aberration compensation lens of a preferred embodiment of the present invention.
Fig. 2 B is the synoptic diagram according to the light-emitting face of the aberration compensation lens of Fig. 2 A.
Fig. 3 A is the synoptic diagram of ring-type block of light-emitting face of the aberration compensation lens of a preferred embodiment of the present invention.
Fig. 3 B is the synoptic diagram of fan-shaped block of light-emitting face of the aberration compensation lens of a preferred embodiment of the present invention.
Fig. 3 C is the synoptic diagram of triangle block of light-emitting face of the aberration compensation lens of a preferred embodiment of the present invention.
Fig. 3 D is the synoptic diagram of quadrilateral block of light-emitting face of the aberration compensation lens of a preferred embodiment of the present invention.
Fig. 3 E is the synoptic diagram of rectangle block of light-emitting face of the aberration compensation lens of a preferred embodiment of the present invention.
Fig. 3 F is the synoptic diagram of honeycomb block of light-emitting face of the aberration compensation lens of a preferred embodiment of the present invention.
10: lens 12: light entrance face
14: light-emitting face 16: optical axis
100: lens combination 110,120: lens
112: light entrance face 114: light-emitting face
116: optical axis 200: the aberration compensation lens
210: lens body 212: light entrance face
214: light-emitting face 214a: block
216: optical axis 220: light filter film
220r: red spectral band light filter film 220g: green light band light filter film
220b: blue wave band light filter film 301,302,303: aberration compensation lens
304,305,306: aberration compensation lens W: white light
B: blue light G: green glow
R: ruddiness b, g, r: position
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of aberration compensation lens, structure, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Please consult simultaneously shown in Fig. 2 A, Fig. 2 B, Fig. 2 A is the synoptic diagram according to a kind of aberration compensation lens of a preferred embodiment of the present invention, and Fig. 2 B is the synoptic diagram according to the light-emitting face of the aberration compensation lens of Fig. 2 A.Aberration compensation lens 200 of the present invention comprise a lens body 210 and a plurality of light filter films 220, and wherein lens body 210 has a light entrance face 212, a light-emitting face 214 and an optical axis 216.Light entrance face 212 or light-emitting face 214 are made of a plurality of discontinuous block (not shown), 214a respectively, and a plurality of light filter films 220 are to comprise red spectral band light filter film 220r, green light band light filter film 220g or blue wave band light filter film 220b, and it is disposed at respectively on the block (not shown), 214a of the light entrance face 212 of lens body 210 or light-emitting face 214.Lens body 210 for example is a spherical lens or a non-spherical lens, or Fresnel lens (fresnellens) etc., and the material of lens body 210 for example is transparent materials such as glass or plastics, but makes light scioptics body 210 and reflect.
Please continue to consult simultaneously shown in Fig. 2 A, Fig. 2 B, when white light W is that parallel optical axis 216 ground are injected by the light entrance face 212 of lens body 210, after lens body 210 refractions, light-emitting face 214 by lens body 210 penetrates again, and this moment, white light W can reflect into a blue light B, a green glow G and a ruddiness R etc.Red spectral band light filter film 220r, green light band light filter film 220g or blue wave band light filter film 220b are disposed at respectively on a plurality of discontinuous block 214a of light entrance face 212 or light-emitting face 214.Light filter film 220r, the 220g of these different color light wave bands, 220b may command are passed through color lights R, G, the B of this light filter film, so only need to adjust shape, thickness and the position of the block 214a of the light entrance face 212 of lens body 210 or light-emitting face 214, and light filter film 220r, the 220g, the 220b that cooperate configuration different color light wave band just can compensate this aberration phenomenon on block 214a.The shape of the block 214a of the light-emitting face 214 of lens body 210 is for example illustrated by following each figure.
Please continue to consult shown in Fig. 2 B, the shape of a plurality of discontinuous block 214a of the light-emitting face 214 of the lens body 210 of aberration compensation lens 200 of the present invention is for example by the lines of a plurality of parallel and vertical optical axis 216, the clathrate that is interwoven, and a plurality of discontinuous block design of the light entrance face 212 of lens body 210 can also be identical with the block 214a of light-emitting face 214, and can do suitable variation.
Following Fig. 3 A～Fig. 3 F, though only illustrate and describe out the block synoptic diagram of the light-emitting face of each aberration compensation lens, but the block design of its light entrance face can also be identical with the block of light-emitting face, and can do suitable variation, therefore in the following description, just repeat no more block shape, the size of light entrance face.The light-emitting face of the aberration compensation lens of Fig. 3 A～Fig. 3 F and light entrance face are except the block shape is different, the description of the remaining component then aberration compensation lens with Fig. 2 A is identical, wherein to be disposed at the position of these blocks then be that refractive index according to each block determines to the light filter film of each different color light wave band, make the light filter film of each different color light wave band there is no certain configuration mode, so following each figure just no longer marks the label of the light filter film of each different color light wave band.
Seeing also shown in Fig. 3 A, is the synoptic diagram of ring-type block of light-emitting face of the aberration compensation lens of a preferred embodiment of the present invention.Compared to aberration compensation lens 200, a plurality of discontinuous block 214a of the light-emitting face 214 of the lens body 210 of present embodiment aberration compensation lens 301 for example is the ring-type block 214a that arranges around optical axis 216.
Seeing also shown in Fig. 3 B, is the synoptic diagram of fan-shaped block of light-emitting face of the aberration compensation lens of a preferred embodiment of the present invention.Compared to aberration compensation lens 200, the light-emitting face 214 of the lens body 210 of present embodiment aberration compensation lens 302 for example is a plurality of discontinuous fan-shaped block 214a.
Seeing also shown in Fig. 3 C, is the synoptic diagram of triangle block of light-emitting face of the aberration compensation lens of a preferred embodiment of the present invention.Compared to aberration compensation lens 200, the light-emitting face 214 of the lens body 210 of present embodiment aberration compensation lens 303 for example is a plurality of discontinuous triangle block 214a.
Seeing also shown in Fig. 3 D, is the synoptic diagram of quadrilateral block of light-emitting face of the aberration compensation lens of a preferred embodiment of the present invention.Compared to aberration compensation lens 200, the light-emitting face 214 of the lens body 210 of present embodiment aberration compensation lens 304 for example is a plurality of discontinuous quadrilateral block 214a.
Seeing also shown in Fig. 3 E, is the synoptic diagram of rectangle block of light-emitting face of the aberration compensation lens of a preferred embodiment of the present invention.Compared to aberration compensation lens 200, the light-emitting face 214 of the lens body 210 of present embodiment aberration compensation lens 305 for example is a plurality of discontinuous rectangle block 214a.
Seeing also shown in Fig. 3 F, is the synoptic diagram of honeycomb block of light-emitting face of the aberration compensation lens of a preferred embodiment of the present invention.Compared to aberration compensation lens 200, the light-emitting face 214 of the lens body 210 of present embodiment aberration compensation lens 306 for example is a plurality of discontinuous honeycomb block 214a.
Anyly know this skill person and can know that all the block shape of the light-emitting face of aberration compensation lens of the present invention not only can also can be the polygonal shapes that the rest may be inferred such as pentagon for above-mentioned Fig. 3 C, the triangle of Fig. 3 D, quadrilateral.In addition, the block shape of the light-emitting face of aberration compensation lens of the present invention can also be the combination of the various block shapes of above-mentioned Fig. 2 B and Fig. 3 A～Fig. 3 F.
It should be noted that, the single aberration compensation lens of the present invention can be by the development of the manufacturing technology of mold insert (mould insert) or plastics ejaculations (plastic injection) more accurately, make the manufacturing accuracy of sphere and aspheric plastic lens improve, so can increase consistance (consistency) and the repeatability (repeatability) and efficient (efficiency) of plastic lens.In other words, also be exactly the consistance that for example increases the optical index of every the plastic lens that manufactures, and improve the output or the assembling yield (yield rate) of plastic lens.
In addition, aberration compensation lens of the present invention can also be applied on the Fresnel lens (Fresnel lens), these Fresnel lens are very suitable for being applied in many optical articles that need thin lens, and especially the brightness enhancement layer of the module backlight of handset displays panel or camera display panel or DVD-ROM's is optically read first-class.
In sum, aberration compensation lens of the present invention only need to adjust shape, thickness and the position of the block of lens body, and the light filter film that cooperates configuration different color light wave band is on block, just aberration for compensation phenomenon effectively.In addition, the present invention just can reach the purpose of aberration compensation because of only needing single lens, compared to the lens combination of two kinds of different refractivities of need, aberration compensation lens of the present invention can reduce its assembly error effectively, so can improve the output or the assembling yield of aberration compensation lens effectively.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (17)
1, a kind of Chromatically compensated lens is characterized in that it comprises:
One lens body has a light entrance face and a light-emitting face, and wherein this light-emitting face is made of most discontinuous first blocks; And
The light filter film of a most different color light wave band is disposed at respectively on this majority discontinuous first block of this lens body.
2, Chromatically compensated lens according to claim 1, it is characterized in that wherein said lens body has an optical axis, and should majority discontinuous first block comprise the ring-type block that most sizes do not wait, and the ring-type block that should a majority size wait is around this optical axis arrangement.
3, Chromatically compensated lens according to claim 1 is characterized in that wherein said should majority discontinuous first block be to be selected from the group that is made up of fan-shaped block and polygon block.
4, Chromatically compensated lens according to claim 1, it is characterized in that wherein said light entrance face is made of most discontinuous second blocks, individual discontinuous second block of described majority disposes the light filter film that the light filter film by the different color light wave band constitutes respectively.
5, Chromatically compensated lens according to claim 4, it is characterized in that wherein said lens body has an optical axis, and should majority discontinuous second block comprise the ring-type block that most sizes do not wait, and the ring-type block that should a majority size wait is around this optical axis arrangement.
6, Chromatically compensated lens according to claim 4 is characterized in that wherein said should majority discontinuous second block be to be selected from the group that is made up of fan-shaped block and polygon block.
7, Chromatically compensated lens according to claim 1 is characterized in that wherein said lens body is Fresnel lens.
8, Chromatically compensated lens according to claim 1, it is characterized in that wherein said lens body be a spherical lens and a non-spherical lens one of them.
9, Chromatically compensated lens according to claim 1, the material that it is characterized in that wherein said lens body be glass and plastics one of them.
10, Chromatically compensated lens according to claim 1 is characterized in that wherein said light filter film that should a majority different color light wave band comprises red spectral band light filter film, green light band light filter film and blue wave band light filter film.
11, a kind of Chromatically compensated lens is characterized in that it comprises:
One lens body has a light entrance face and a light-emitting face, and wherein this light entrance face is made of most discontinuous blocks; And
The light filter film of a most different color light wave band is disposed at respectively on this majority discontinuous block of this lens body.
12, Chromatically compensated lens according to claim 11, it is characterized in that wherein said lens body has an optical axis, and should majority a discontinuous block comprise the ring-type block that most sizes do not wait, and the ring-type block that should a majority size wait is around this optical axis arrangement.
13, Chromatically compensated lens according to claim 11 is characterized in that wherein said should a majority discontinuous block be to be selected from the group that is made up of fan-shaped block and polygon block.
14, Chromatically compensated lens according to claim 11 is characterized in that wherein said lens body is Fresnel lens.
15, Chromatically compensated lens according to claim 11, it is characterized in that wherein said lens body be a spherical lens and a non-spherical lens one of them.
16, Chromatically compensated lens according to claim 11, the material that it is characterized in that wherein said lens body be glass and plastics one of them.
17, Chromatically compensated lens according to claim 11 is characterized in that wherein said light filter film that should a majority different color light wave band comprises red spectral band light filter film, green light band light filter film and blue wave band light filter film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100065318A CN100427970C (en) | 2004-03-04 | 2004-03-04 | Optical aberration compensating lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100065318A CN100427970C (en) | 2004-03-04 | 2004-03-04 | Optical aberration compensating lens |
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| CN1664622A CN1664622A (en) | 2005-09-07 |
| CN100427970C true CN100427970C (en) | 2008-10-22 |
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| CNB2004100065318A Expired - Lifetime CN100427970C (en) | 2004-03-04 | 2004-03-04 | Optical aberration compensating lens |
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| CN104777529B (en) * | 2015-04-07 | 2016-04-27 | 中国计量学院 | A kind of design preparation method compensating the optical anti-reflection multilayer film of simple lens spherical aberration |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1123972A (en) * | 1997-07-02 | 1999-01-29 | Olympus Optical Co Ltd | Image-forming optical device |
| US20020089596A1 (en) * | 2000-12-28 | 2002-07-11 | Yasuo Suda | Image sensing apparatus |
| CN1444734A (en) * | 2000-09-05 | 2003-09-24 | 日本板硝子株式会社 | Optical element having wavelength selectivity |
-
2004
- 2004-03-04 CN CNB2004100065318A patent/CN100427970C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1123972A (en) * | 1997-07-02 | 1999-01-29 | Olympus Optical Co Ltd | Image-forming optical device |
| CN1444734A (en) * | 2000-09-05 | 2003-09-24 | 日本板硝子株式会社 | Optical element having wavelength selectivity |
| US20020089596A1 (en) * | 2000-12-28 | 2002-07-11 | Yasuo Suda | Image sensing apparatus |
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| CN1664622A (en) | 2005-09-07 |
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